Nathaniel Dennis, 24, was visiting family in Liberia when his family said he had some type of medical problem that caused him to have seizures and fall into a coma nearly a week ago. Due to the Ebola crisis, officials wouldn't let his family take him out of the country to get help.

The family said Dennis needed to get to a new medical facility in Ghana that's equipped to care for him, but they said Liberia's government would not allow medics to take him there because they didn't want the Ebola virus to spread any further.

Liberia's president closed the majority of the country's borders to try to stop the Ebola spread days after Dennis fell ill.

The disease has killed more than 100 people so far in that country and about 700 people throughout west Africa. The Peace Corps is currently evacuating its volunteers from three affected countries, including Liberia.

Dennis had initially been quarantined due to the Ebola outbreak, but he tested negative for the deadly virus, his family said.

"He tested negative twice, you know. They tested him twice," said Dennis' brother, Norwood Dennis IV. "I just keep thinking about the time that was wasted. Those few days he was in quarantine, you know, maybe those were the days he could have gotten (somewhere else) before the decisions were made to close off the borders, and maybe he could have gotten better care faster."

Dennis' family said they had requested assistance from the U.S. embassy in Monrovia, Liberia's capital, but they weren't able to get permission to get him to Ghana or to the U.S.

Norwood Dennis IV said he believed his brother could have been saved, but he said Ebola hysteria in Liberia led to his death. The family worries the outbreak is killing more people than it should.

"He's probably not the only one who can't get help. He may not have been the first one," Norwood Dennis IV said.

Dennis' family still does not know what killed him. They are working to get his body flown back to the U.S. for a proper burial.

Dennis' sister said he was an aspiring musician who worked at a radio station in Liberia before he got sick. He graduated from Howard High School and studied at Howard Community College. His family and friends described him as "endlessly positive and energetic."

Meanwhile, Dr. Michael Zimring, the director of travel medicine for Mercy Medical Center, said situations like that could be avoided ahead of time if people buy travel insurance where physicians in the U.S. can arrange for a person's evacuation.

"It may cost $3 or $4 a day as a premium, but coming back from these areas like west Africa, you are talking between $50,000 and $100,000 a trip on an air ambulance. So, if you have this insurance, you are protected," Zimring said.

SERVED AS DEPUTY COMMISSIONER OF THE FDA AND BALTIMORE CITY'S HEALTH COMMISSIONER. THE WORST EBOLA OUTBREAK IN HISTORY HAS KILLED HUNDREDS OF PEOPLE IN WEST AFRICA SO FAR. THE PEACE CORPS IS NOW DE FACTO WE CAN ITS VOLUNTEERS FROM THREE COUNTRIES AFFECTED, INCLUDING LIBERIA, WHERE A MARYLAND MAN DIED AFTER HE WAS QUARANTINED. THE MAN'S FAMILY SAYS HE NEVER HAD A VIRUS. GEORGE LETTIS IS LIVE IN THE STUDIO TO TELL US WHAT HAPPENED. IT MAY BE A SYMPTOM OF THE PANIC GOING ON IN AFRICA. NATHANIEL DENNIS WAS THERE VISITING FAMILY. HE GOT VERY SICK, BUT WE ARE TOLD HE TESTED NEGATIVE FOR EBOLA. HIS RELATIVES ARE WONDERING WHY HE WAS QUARANTINES. AFTER BEING IN A COMA FOR THREE DAYS WHILE VISITING HIS MOTHER, RELATIVES OF HOWARD HIGH SCHOOL GRADUATE NATHANIEL DENNIS SAY THE 24-YEAR-OLD DIED WEDNESDAY EVENING HE TESTED NEGATIVE FOR -- EVEN THOUGH HE TESTED NEGATIVE FOR EBOLA. ALL WEEK, RELATIVES TRIED TO GET HIM TO A BETTER HOSPITAL AFTER HE STARTED HAVING SEIZURES. I'M ANGRY THAT WE'VE BEEN UNABLE TO OVERRIDE THE HOLE THAT THEY HAVE PUT ON ALL OF THE BORDERS AND THAT WE'VE BEEN UNABLE TO GET HIM OUT OF THE COUNTRY. DENNIS HIS BROTHER BELIEVES HE COULD HAVE BEEN SAVED, BUT HE BELIEVES EBOLA HYSTERIA KILLED HIM. THEY TESTED HIM TWICE. I KEEP KING ABOUT THE TIME THAT WAS WASTED -- I KEEP TALKING ABOUT THE TIME THAT WAS WASTED. IF HE COULD'VE GOTTEN THERE BEFORE THE DECISION WAS MADE TO CLOSE OFF THE BORDERS, MAYBE HE COULD'VE GONE BETTER CARE. THE FAMILY WORRIES OF THIS OUTBREAK IS KILLING MORE PEOPLE THAN IT SHOULD. HE'S PROBABLY NOT THE ONLY ONE WHO CAN'T GET HELP. HE MAY NOT HAVE BEEN THE THE FIRST ONE. THE DIRECTOR OF TREVOR MENDELSON FROM MERCY HOSPITAL SAYS SITUATIONS LIKE THIS COULD BE AVOIDED AHEAD OF TIME IF YOU BUY TRAVEL INSURANCE WHERE OFFICIALS ARRANGE FOR YOUR EVACUATION. IT MAY COST YOU THREE OR FOUR DOLLARS A DAY AS A PREMIUM, BUT COMING BACK FROM THESE COUNTRIES LIKE WEST AFRICA, YOU'RE TALKING ABOUT IF THE THOUSAND DOLLARS A TRIP, $100,000 A TRIP. DENNIS'S FAMILY DOES NOT KNOW WHAT KILLED NATHANIEL. THEY ARE WORKING TO GET HIS BODY